Re: What is the right syntax for retrieving the last_insert_id() inPostgresql ?

ne 1. 3. 2020 v 11:18 odesílatel Karen Goh <karenworld@yahoo.com> napsal:

Hi,

I hope I am posting on the right forum.  I googled but I can't find any solution pertaining to my problem.

Could someone know what is the syntext for last_insert_id() in Postgresql for me to insert into my sql execute query?

Postgres has not last_insert_id function. Maybe you think "lastval" function

https://www.postgresql.org/docs/current/functions-sequence.html

Regards

Pavel

public int getTutorById() {
                openConnection();
                int tutor_id = 0;
                try {
                        Statement stmt3 = connection.createStatement();
                        ResultSet rs = stmt3.executeQuery("SELECT last_insert_id() from xtutor");
                        {
                                while (rs.next()) {
                                        tutor_id = rs.getInt(1);                                                       
                                }
                        }
                } catch (SQLException e) {
                        e.printStackTrace();
                }
                return tutor_id;
        }

org.postgresql.util.PSQLException: ERROR: function last_insert_id() does not exist
  Hint: No function matches the given name and argument types. You might need to add explicit type casts.
  Position: 8
        at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2440)
        at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2183)
        at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:308)
        at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:441)
        at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:365)
        at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:307)
        at org.postgresql.jdbc.PgStatement.executeCachedSql(PgStatement.java:293)
        at org.postgresql.jdbc.PgStatement.executeWithFlags(PgStatement.java:270)
        at org.postgresql.jdbc.PgStatement.executeQuery(PgStatement.java:224)
        at daoMySql.tutorDAOImpl.getTutorById(tutorDAOImpl.java:202)
        at daoMySql.tutorDAOImpl.getAlltutors(tutorDAOImpl.java:161)
        at business.manager.getAlltutors(manager.java:99)

The generated id is successfully generated by JDBC.

The errors when I tested in out using PGAdmin4 is

ERROR:  function last_insert_id() does not exist
LINE 1: SELECT last_insert_id() from xtutor;
               ^
HINT:  No function matches the given name and argument types. You might need to add explicit type casts.
SQL state: 42883
Character: 8

Postgresql 11, Windows 11

Thanks.